• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

vocoder

  1. D

    Motorola DTR Vocoder

    Does anybody know what is the vocoder used in Motorola DTR radios?
  2. H

    Digital interoperability: Vocoders, Standards, Oh My!

    I have been trying to figure out which digital radios can communicate with each other using digital voice. I have come across a lot of terms and acronyms and I am trying to sort out which is a standard and which is a vocoder. My goal is to try and put together a list of digital radios that can...
  3. F

    Consider a Vocoder Beyond AMBE+2

    It seems Digital Voice Systems has a lock on the preferred vocoder for use in LMR equipment. DVS got IMBE into P25 years ago, and it is now won acceptance of the newer AMBE+2 vocoder. The excellent voice quality of the AMBE+2 has also captured the favored position in almost every standard...
  4. C

    Fire Dept Tests P25 Radios

    Prior to January 1, 2013, emergency service departments nationwide will need to comply with the new FCC narrowband guidelines. On February 24, 2010 the Maple Bluff Fire Department (MBFD) in Dane County WI performed an unbiased and impartial radio test. They compared the sound quality of the...
  5. C

    EF Johnson Technologies, Inc. To Showcase New AMBE+2 1.6 Vocoder at IWCE

    Irving, TX – March 8, 2010 – EF Johnson Technologies, Inc. (NASDAQ: EFJI) announced today that it will showcase the new AMBE+2 1.6 vocoder at the International Wireless Communications Expo (IWCE) March 10 – 12 at the Las Vegas Convention Center. The AMBE+2 1.6 vocoder was adopted by the Project...
  6. P

    Relationship between Vocoder and Speech frames.

    Hi Please can you tell me the relation ship between the vocoder we use in Mobile/Portables to the max speech which can be compressed in the time slot( i mean a a given frame of the protocol). Any links, tutorials, or references are welcome. Regards PC
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